Le 23/06/2019 à 04:06, Ross Boylan a écrit :

My leading suspect for why the hard disks aren't recognized is that
they are all attached through
02:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic
SAS2116 PCI-Express Fusion-MPT SAS-2 [Meteor] (rev 02)
whereas before they were vanilla SATA (although at least one used a
SATA expansion card).  I am not using the card for RAID and was told
it didn't even support RAID.  The box says it's an LSI SAS 9201-16i
Host Bus Adapter.

Possible causes of this kind of problem include :
- lack of support by the kernel (too old for the new hardware)
- missing driver in the initramfs.

Could you post the detailed identification of the adapter printed by "lspci -nn" ? According to the identification string the VID:DID should be 1000:0064 or 1000:0065. Both identifiers have been recognized by the mpt2sas/mpt3sas module at least since Jessie.

When at the initramfs prompt, could you check whether the mpt3sas module is present in lib/modules/<version>/kernel/drivers/scsi/mpt3sas/mpt3sas.ko and loaded (as shown by lsmod or in /proc/modules) ? If it is missing, maybe "MODULES=dep" was set in /etc/initramfs-tools/initramfs.conf (including only modules for the current hardware at the time of initramfs build) instead of "MODULES=most" (including modules for most storage hardware).

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